Protective covering for welding rods



Patented Oct. 10,

UNITED STATES PATENT OFFICE PROTECTIVE COVERING FOR WELDING RODSRene-Wassermann, New York, N. Y.

- gclaims This invention relates to welding rods or electrodes and moreparticularly to rods or electrodes for use in connection with welding orsimilar bonding processes on bases made of ferrous or non-ferrousmaterial, on aluminum articles or on any work pieces containing zinc,magnesium or the like.

It is an object of the present invention to provide means whereby toattribute a better appearance to electrodes of the above nature, whilethe properties of the alloy of which the core of said electrodeconsists, are not substantially changed for the welding or like,operation.

It is another object of the present invention to provide covering meansfor electrodes whereby the same become more fluid, and the meltingis toprovide protective means, such as a layer or Instead of dipping the rodinto a bath the coating may be produced by known electro-galvanicmethods, by any chemical treatment or reaction, or mechanically, such asby a spraying process.

In place of silver, other'types of coating or combined coatings may beused which may com-- prise silver, the latter being particularly adaptedto improve fluidity and appearance of the welding. rod.

According to one embodiment of the invention, the welding rodmaterial'which may comprise copper, nickeL'silicon and zinc, may furtherbe provided with a silver coating of suitable quantity forming acomplementary ingredient I the following proportions: 2% silver, copper43% by weight, nickel 11% by weight, silicon .3% by weight and zinc43.'7% by weight.

coating extending partly or wholly over the surface of welding rods, thethickness of said layer varying in accordance with thepurpose and actionto be'obtained during welding or like bonding operation.

Still a further object of the present invention is to provide means forcovering electrodes or welding rods which may be used for soldering,welding, brazing or similar purposes, an ingredient of the alloy of theelectrode forming the material for said cover means which is resistantto corrosion and other undesirable atmospheric influences.

Other objects of the invention will appear as included, as partof theinvention all such ob- In accordance with the present invention, it isproposed to incorporate in the aforesaid alloy silver only in suchamount that the latter and silver or like coating material preventingcorrosion, such as nickel, etc,, may extend intermittently orcontinuously or wholly or only partially over the circumference andlength of the welding or brazing rod as the case may be.

1. Cast-iron welding rod containing approximately Per cent i by weightCarbon 3 Manganese .5 Phosphorus .5 Silicon 3 Sulphur .1

receives a silver coating or coatingof cadmium by spraying the coatingon said rod by means of The alloy may consist of the herein mentionedingredients in approximately be .005 inch to .010 inch.

2. A welding rod consisting of Per cent by weight Copper 60 Zinc 39.!Manganes .3

is coated with silver obtained by dipping the rod in a silver nitrateelectro-plating solution of sufllcient strength (concentration) forabout two (2) minutes which will result in a thin and'even filmlikecoating of required quantity.

It can thus be seen that there has been provided, in accordance withthis invention, a rod for welding, brazing, soldering and likeoperations on metallic bases, which rod comprises a core of weldmaterial, and a corrosion-resistant metallic film extending at leastpartially over the circumference and length of said core, the thicknessof said metallic film being below .01" so as to protect the core surfaceagainst the attack of atmospheric influences during storage and withoutsubstantially changingthe properties of said core, the quantity of saidmetallic film on said core surface being only of such moderate amount asto leave said base unafiected when said weld metal is applied thereto.

In accordance with the above it is well understood that wide deviationsand changes may be made from the embodiments and examples herein setforth without departing from the spirit of this invention.

1. A rod for welding, brazing, soldering, and

like operations on metallic bases, comprising a to protect the coresurface against the attack of atmospheric influences during storage andwithout substantially changing the properties of said core, the quantityof said metallic film on said core surface being only of such moderateamount as to leave said base unaffected when said weld metal is appliedthereto.

2. A rod for welding, brazing and like operation comprising a core ofweld material, said weld material including as a constituent silver, anda film-like coating of silver up to approximately .01 inch thickprovided on the surface of said core, said coating of silver serving tolower the melting point of said 'core material and effectivelyprotecting said core against atmospheric influences during storage.

Having thus described the invention what is ters Patent, is:

- coating of silver of a thickness below .01 inch provided on thesurface of said core, the sum of the amounts of silver present in saidcore and in said coating beingsubstantially equal to the total amount ofsilver capable of increasing-the fluidity of said weld material duringwelding or like operation, said silver coating protecting said RENE

